公开(公告)号：US20240333395A1

公开(公告)日：2024-10-03

申请号：US18409889

申请日：2024-01-11

申请人： NEC Corporation

发明人： Atsushi KOZATO

IPC分类号： H04B10/572 ,  H01S5/0625 ,  H01S5/125 ,  H04B10/50

CPC分类号： H04B10/572 ,  H01S5/06256 ,  H01S5/125 ,  H04B10/506

摘要： An object is to control the wavelength of a light output from a wavelength-tunable light source device with high precision. A light source outputs a light. A wavelength filter transmits a light having a wavelength being a part of a wavelength included in the light output from the light source. A transmission characteristics adjustment unit can adjust transmission characteristics of the wavelength filter. A control unit controls the transmission characteristics adjustment unit. A wavelength detection unit detects a wavelength of the light transmitted by the wavelength filter. The control unit feedback-controls adjustment of the transmission characteristics of the wavelength filter in the transmission characteristics adjustment unit to cause the wavelength detected by the wavelength detection unit to be a value within a predetermined range including a target wavelength.

公开(公告)号：US20240243811A1

公开(公告)日：2024-07-18

申请号：US18154468

申请日：2023-01-13

申请人： HUAWEI TECHNOLOGIES CO., LTD.

发明人： Zhiping JIANG ,  Xiang LIN

IPC分类号： H04B10/2569 ,  H04B10/572

CPC分类号： H04B10/2569 ,  H04B10/572

摘要： The disclosed systems and methods are for reducing polarization dependent loss in an optical link including: i) changing, by a state of polarization (SOP) controller, an SOP of an optical signal propagating in the optical link; ii) computing, by a link controller, a polarization dependent loss (PDL) in a portion of the optical link; iii) generating, by the link controller, a control signal according to the PDL; and iv) based on the control signal, changing, by the SOP controller, the SOP of the optical signal.

公开(公告)号：US20240235672A1

公开(公告)日：2024-07-11

申请号：US18572438

申请日：2022-06-10

申请人： ZTE CORPORATION

发明人： Yinqiu JIA ,  Hu SHI

IPC分类号： H04B10/079 ,  H04B10/564 ,  H04B10/572

CPC分类号： H04B10/07953 ,  H04B10/07955 ,  H04B10/564 ,  H04B10/572

摘要： An OSNR measurement method and apparatus, and a computer storage medium are disclosed. The OSNR measurement method may include: adjusting a measurement light source to an ASE state (S100); adjusting a signal width of the measurement light source to a first width according to a spectral bandwidth of a channel to be measured, and acquiring a total channel power at an OPM point of a receive-end station (S200); adjusting the signal width of the measurement light source to a second width, and acquiring a noise power at the OPM point of the receive-end station (S300), where the second width is less than the first width, and center frequencies of signals corresponding to the first width and the second width are staggered apart from each other; and determining an OSNR of the channel to be measured according to the total channel power and the noise power (S400).

公开(公告)号：US20240214068A1

公开(公告)日：2024-06-27

申请号：US18595085

申请日：2024-03-04

申请人： Tektronix, Inc.

发明人： Evan Douglas Smith ,  John J. Pickerd ,  Williams Fabricio Flores Yepez ,  Heike Tritschler

IPC分类号： H04B10/079 ,  G06N20/00 ,  H04B10/07 ,  H04B10/077 ,  H04B10/40 ,  H04B10/564 ,  H04B10/572 ,  H04B10/58

CPC分类号： H04B10/0795 ,  H04B10/0771 ,  H04B10/0775 ,  H04B10/0777 ,  G06N20/00 ,  H04B10/07 ,  H04B10/40 ,  H04B10/564 ,  H04B10/572 ,  H04B10/58

摘要： A method of training a machine learning system to determine operating parameters for optical transceivers includes connecting the transceiver to a test and measurement device, tuning the transceiver with a set of parameters, capturing a waveform from the transceiver, sending the waveform and the set of parameters to a machine learning system, and repeating the tuning, capturing, and sending until a sufficient number of samples are gathered.

公开(公告)号：US12009866B2

公开(公告)日：2024-06-11

申请号：US18181286

申请日：2023-03-09

申请人： AT&T Intellectual Property I, L.P.

发明人： Ricky Perry ,  Kent McCammon

IPC分类号： H04B10/2575 ,  H04B10/27 ,  H04B10/291 ,  H04B10/516 ,  H04B10/572 ,  H04J14/02 ,  H04Q11/00

CPC分类号： H04B10/572 ,  H04B10/25752 ,  H04B10/25753 ,  H04B10/27 ,  H04B10/2912 ,  H04B10/516 ,  H04J14/0212 ,  H04Q11/0062 ,  H04Q2011/0011 ,  H04Q2011/0088

摘要： Aspects of the subject disclosure may include, for example, receiving a first optical signal from a first optical network via a first port of the wavelength converter, receiving a second optical signal from a second optical network via a second port of the wavelength converter, modulating the first optical signal with the second light signal to generate a third optical signal, eliminating the first light signal from the third optical signal to generate a fourth optical signal, and transmitting the fourth optical signal through the second optical network. The first optical signal can include a first digital signal modulated onto a first light signal of a first wavelength, the second optical signal can include a second light signal can include a second wavelength different from the first wavelength, and the fourth optical signal can include the first digital signal modulated onto the second light signal. Other embodiments are disclosed.

公开(公告)号：US20230412278A1

公开(公告)日：2023-12-21

申请号：US18460296

申请日：2023-09-01

申请人： HUAWEI TECHNOLOGIES CO., LTD.

发明人： Jinlong Wei ,  Zhicheng Ye ,  Zhixin Liu

IPC分类号： H04B10/572 ,  H04B10/27 ,  H04B10/50 ,  H04B10/516

CPC分类号： H04B10/572 ,  H04B10/27 ,  H04B10/503 ,  H04B10/516

摘要： A system for wavelength control in a passive optical network (PON) with point to multi-point (P2MP) topology comprising a central node and end node. The system comprises a central node transceiver configured for broadcasting to end nodes a reference signal carrying a management information, wherein the management information indicates a target frequency assigned to each end node, and an end node transceiver in each end node configured for determining the target frequency by extracting the management information from the reference signal. The system comprises generating a beating frequency by beating the reference signal with an uplink laser signal, and controlling a wavelength of the uplink laser signal to lock to the target frequency based on the beating frequency. The system is compatible with existing power-split optical distribution networks (ODN), with tolerance to an uplink reflection, and has high power sensitivity.

公开(公告)号：US11835337B2

公开(公告)日：2023-12-05

申请号：US17646080

申请日：2021-12-27

申请人： Lumentum Technology UK Limited

发明人： Adrian Perrin Janssen

IPC分类号： G01B9/02 ,  G01B9/02056 ,  H04B10/572 ,  G01J3/453 ,  H01S5/0687

CPC分类号： G01B9/02051 ,  G01B9/02058 ,  G01J3/453 ,  H04B10/572 ,  G01B9/02 ,  H01S5/0687

摘要： There is described an interferometer for use in an optical locker. The interferometer comprises at least two transparent materials having different thermal path length sensitivities. The interferometer is configured such that an input beam is split by the interferometer into first and second intermediate beams, which recombine to form an output beam, the first and second intermediate beams travelling along respective first and second intermediate beam paths which do not overlap. At least one of the intermediate beam paths passes through at least two of the transparent materials. A length of each intermediate beam path which passes through each transparent material is selected such that an optical path difference between the first and second intermediate beam path is substantially independent of temperature.

公开(公告)号：US11831353B2

公开(公告)日：2023-11-28

申请号：US17659532

申请日：2022-04-18

申请人： Alpine Optoelectronics, Inc.

发明人： Tongqing Wang ,  Zhoufeng Ying ,  Dawei Zheng ,  Jin Yao

IPC分类号： H04B10/50 ,  H04J14/02 ,  H01S5/14 ,  H04B10/572

CPC分类号： H04B10/506 ,  H01S5/141 ,  H04B10/5051 ,  H04B10/572 ,  H04J14/0209 ,  H04J14/0223 ,  H04J14/0282

摘要： An integrated transmitter chip comprising: at least one input port disposed at a first end of the integrated transmitter chip; a first variable power divider optically connected to each input port of the at least one input port; a second and a third variable power dividers optically branched from each first variable power divider; a first and a second optical channel optically branched from the second variable power divider, a third and a fourth optical channel optically branched from the third variable power divider; and at least one WDM optically attached to corresponding optical channels and configured to selectively modify the polarization of and multiplex corresponding optical signals into a output optical signal, wherein a laser beam is launched into an input port, split by corresponding variable power dividers based upon each dividers corresponding splitting ratio, then multiplexed and combined into an output optical signal having dual polarization modes.

公开(公告)号：US20230352897A1

公开(公告)日：2023-11-02

申请号：US18337362

申请日：2023-06-19

申请人： Ayar Labs, Inc.

发明人： Milos Popovic ,  Rajeev Ram ,  Vladimir Stojanovic ,  Chen Sun ,  Mark Taylor Wade ,  Alexandra Carroll Wright

IPC分类号： H04B10/40 ,  H04B10/572 ,  H01S3/08 ,  H04B10/50 ,  H01S3/00 ,  H01S3/23 ,  H04J14/02 ,  H01S3/04 ,  H04B10/25

CPC分类号： H01S3/08086 ,  H01S3/005 ,  H01S3/0405 ,  H01S3/2391 ,  H04B10/25 ,  H04B10/40 ,  H04B10/503 ,  H04B10/506 ,  H04B10/572 ,  H04J14/02 ,  H04J14/025 ,  H04J2014/0253 ,  H04J14/0282

摘要： A laser light generator is configured to generate one or more wavelengths of continuous wave laser light. The laser light generator is configured to collectively and simultaneously transmit each of the wavelengths of continuous wave laser light through an optical output of the laser light generator as a laser light supply. An optical fiber is connected to receive the laser light supply from the optical output of the laser light generator. An optical distribution network has an optical input connected to receive the laser light supply from the optical fiber. The optical distribution network is configured to transmit the laser light supply to each of one or more optical transceivers and/or optical sensors. The laser light generator is physically separate from each of the one or more optical transceivers and/or optical sensors.

公开(公告)号：US11711150B2

公开(公告)日：2023-07-25

申请号：US17437925

申请日：2020-03-06

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Atsuko Kawakita ,  Kazutaka Hara ,  Yasutaka Kimura ,  Kenji Horikawa ,  Hiroyuki Furukawa

IPC分类号： H04B10/272 ,  H04B10/572 ,  G02B6/287 ,  H04B10/50 ,  H04J14/02

CPC分类号： H04B10/572 ,  G02B6/287 ,  H04B10/272 ,  H04B10/506 ,  H04J14/0204

摘要： An object is to provide an optical communication system and an optical communication method that are capable of, when assigning wavelengths on a per-service basis and providing services on a per-area basis, preventing degradation of signal quality due to linear crosstalk and preventing an increase in cost and size. An optical communication system according to the present invention includes an optical splitter 300 connecting N first ports and M second ports by a combination of 2×2 fiber optical splitters, N and M each being an integer of two or more, where wavelengths of optical signals to be received are limited for each group of optical receivers 106, by using a correlation between a fused extension length of at least one 2×2 fiber optical splitter directly connected to the first port, among the 2×2 fiber optical splitters, and wavelength output characteristics of the second port of the optical splitter 300.